1) 1-cos2a/1+cos2a + 12) 1-cos2a/1+tg^2(квадрат)a

Question

1) 1-cos2a/1+cos2a + 1
2) 1-cos2a/1+tg^2(квадрат)a

Answer 1

1)1/cos(a)^2
2)(2*sin(a)^6-3*sin(a)^4+2*sin(a)^2)/cos(a)^4